According to your description, I suggest you refer to the following information:
1. Your notebook will have a black screen after installing the graphics card driver, which is probably caused by not installing the appropriate graphics card driver. The notebook has not been tested by the third-party software that drives the wizard before leaving the factory, so its stability and accuracy cannot be guaranteed. If you can still "enter the system" after booting, it is recommended that you uninstall the previously installed graphics card driver and try to install the graphics card driver announced by HP official website.
If you can't get into the system after booting, press F8 to see if there are options such as "Select last known configuration" or "Safe mode". If you can see "Choose to use the last known good configuration", please select it to see if it enters the system normally. If you can't enter the system, please enter "Safe Mode", uninstall the previously installed graphics card driver, and then see if you can enter the system.
2. Tips: For how to download the drivers of corresponding products from HP official website, please refer to the following official documents:
/zh/support-drivers/e support/as CPPS . html
I hope the above reply can help you.
If the above information can't solve your problem, you can log on to www.hp.com.cn/chat,, the online chat room of HP Network, and ask an online engineer to help you solve the problem further. More product information is available in www.hp.com.cn/800..